Triangular paper bag



(No Model.) v 2 Sheets-Sheet 1.-

G. MORTSON.

TRIANGULAR PAPER BAG.

Patente r. 29,1890.

Mari.

THE. uunms FEYERS 20-. PHOTO-1140., wAsmNr-Tan, u. c.

2 Sheets-Sheet 2.

(No Model.)

G. M'ORT'SON.

TRIANGULAR PAPER BAG.

IZIGT'Z JEN-Magpies? THE Moms rnzns 00., Puma-mum, WASHINGTON, a. c.

UNITED STATES PATENT OFFICE.

GEORGE MORTSON, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE UNION PAPERBAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

TRIANGULAR PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 426,841, dated April29, 1890.

Application filed J annary 2, 1890. Serial No. 335,608. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE MORTSON, a subject of the Queen of GreatBritain, and a resident of Bridgeport, county of Fair-field,

State of Connecticut, have invented a new and useful Triangular PaperBag, of which the following is a true and exact description, referencebeing had to the accompanying drawings, which form a part of thisspecifi- Io cation.

My invention relates to the manufacture of an improved triangular paperbag, the leading novel features of which consist in the peculiarfold-lines provided for collapsing the 1' 5 bag for shipment anddistribution.

My invention will be best understood as described in connection with thedrawings, which illustrate not only my improved bag itself, but also theway of making the same from a collapsed tube of paper or bag-blank.

Figure 1 is a perspective view of a bagblank or paper tube, some of thelines of folding in the bag being indicated in dotted lines and some insolid lines. Fig. 2 is a perspec- 2 5 five view of the blank spread openat the bottom and with the triangular fold which forms the leadingfeature of my invention formed in it. Figs. 3 and 4. show the foldingdown of the bottom of the tube to form the bag-bottom. Fig. .5 shows howthe bag-bottom may be folded down, if desired. Fig. 6 shows the bagpartially opened, and Fig. 7 shows it completely opened.

The method of making my improved bag,

5 as shown in Figs. 1 to 4., inclusive, gives, when followed, the bestpossible idea of the construction of the bag.

A is a plain tube of paper or bag-blank folded, as shown, at a and a,such a blank being prepared in any way. The next step is to determinethe line on which the tube shall be opened to form the bottom. Thisline, when working with the collapsed tube, must be oblique, as shown atd,beginningata point b on one fold-line a and running obliquelyupwardacross the blank to a point 0 on the fold-line a. The distance of pointI) from the end of the blank determines the amount of the tube which isto be folded down to form or assist in forming the bag-bottom, all ofthe blank below the line g, which runs across the blank from b at rightangles to the fold-lines a a, being thus folded. The line (2 having beendetermined, the blank is opened, as shown in Fig. 2, the upper side ofthe blank being folded back on itself along line cl and from b to 0,while the edge a below point cis spread out and folded down into thetriangular fold H. In doing this the line of the opened fold-line ashould lie over the foldline (I. The fold H is properly defined by thepoint 0 and the points 72 12 at which the lines of fold e e of said foldintersect the foldline 9, and in makingthe fold-lines c e the flapsI J Kare defined, which,if erected, would form a triangular box-like figurehaving its base in the lines g. g and g and upper corners atf and f Theflaps I, J, and K are then folded down upon each other, as shown inFigs. 3 and 4, paste being first applied to the appropriateparts of theflaps; or of course they may be folded and pasted down on an insertedcard or piece of paper, which forms a bottom when the flaps I J K arepasted to it.

If desired, the bottom and triangular fold Il may be folded overtogether on the line d, as shown in Fig. 5.

The bag, when opened, comes to a triangular form, as shown in Fig. 7,Fig. 6 showing it as partially opened. When completely 8o opened, thefold H is included in one of its three rectangular sides, which aredefined by the fold-line a and the lines a a the fold-line a lying inthe center of the side included between the fold-lines a a which sidealso in-. eludes the triangular fold H.

The essential features of my bag are its triangular bottom, a medialfold-line extending longitudinally of one of its sides, and thetriangular fold H, having its base correspondo ing with that of suchside and its apex in said medial line, these features being the oneswhich enable it to be collapsed readily and in convenient form.

The method described for making the bag 5 is not of the essence of theinvention, as the bag may, if desired, be formed over a triangular blockand then collapsed, so that the triangular fold H will be the lastinstead of one of the first folds formed. :00

Having now described my invention, What I claim as new, and desire tosecure by Letters Patent, is

A paper bag having a triangular bottom 5 formed at one end, a medialfold-line extending lolilgitudinully of one of its sides, and atriangular fold II',11av.ing its base in correspondence with the bottomedge of. such side and its apex upon said medial fold-line, allsubstantially as and fol'thepm'pose specified. [O

GEORGE MORTSON. \Vitnesses:

A. M. Woostrnn, ARLEY I. M UNSON.

